diff --git a/core/main.mk b/core/main.mk
index 8a5b407..407a529 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -213,6 +213,14 @@
 endif
 
 # -----------------------------------------------------------------
+# Variable to check java support level inside PDK build.
+# Not necessary if the components is not in PDK.
+# not defined : not supported
+# "sdk" : sdk API only
+# "platform" : platform API supproted
+TARGET_BUILD_JAVA_SUPPORT_LEVEL := platform
+
+# -----------------------------------------------------------------
 # The pdk (Platform Development Kit) build
 include build/core/pdk_config.mk